Earth boring tool



Nov. 29,1932. c. E REED 1389216 EARTH BORING TOOL Filed Dec. 3, 1928 2Sheets-Sheet 2 Inueni'on nee E'Beed,

Aug 4'.

Patented Nov. 29 1932 i ,NETEE PATENT QFFISCE CLARENCE E. REED,'OFFJ'ICHITA, KANSAS, ASSIGNOR TO CHICAGO PNEUMATIC TOOL COMPANY, OF NEVJYORK, N. Y., A COR'EORATION' OF NEW JERSEY EARTH BORING TOOL Applicationfiled. December 3, 1928. Serial No. 323,273.

The invention relates to apparatus used in flange or base to fit theseat recess and a connection with earth boring for making spindleconnected integrally with said flange deep wells and concerns a toolinvolving a and shank, said spindle extending at a right chuck fiorholding implements or members angle to the inclined wall into theinverted employed in carryingout the wor V-shaped recess, so as toextend downwardly 55 In carrying out the invention I provide a andinwardly towards the vertical axis of chuck combined with a holdertherefor, the head andin convergent relation to each which latter isadapted to receive the chuck other. These spindles carry the rotaryremovably, said holder preferably being toothed cutters. The units areinserted into adapted to receive cutting units so that the place bymoving them vertically parallel co same head or holder may be usedeither in with the vertical axis of the drill. When in carrying thecutting units directly, or place the cutter units are held by nuts orthrough the medium of a chuck. A difierent screw collars engaging theupper threaded form of cutter or other tool thus may be subends of theshanks of the unit, which project stituted for the said directlysupported cutinto laterally open recesses 6 into which the co tingunits. nuts are inserted.

The invention consists in the features and It is sometimes desirable touse a difcombination and arrangement of parts hereferent form of tool orcutter unit instead inafter described and particularly pointed of therotary toothed cutters, such for inout in the claims. stance, as a fishtail cutter or bit, or to use In the accompanying drawings: a fishingtool, and in order to avoid the ne- Figure 1 is a sectional view of abit head cessity of having an entirely separate outfit or holder withthe chuck mounted therein. involving a head or holder for this difierentFig. 2 is a bottom plan view of the chuck. form of tool, I have provideda chuck adapt- 5 Fig. 3 is a view "similar to F1g. 1 of the ed to bemounted in the bit head above dehead. scribed, so that this head may beused either Fig. 4 is a view of the chuck assembly with rotary toothedcutters or with other ready for insertion into the head. forms oftoo-ls. This chuck comprises two In these drawings 1 indicates a onepiece members? forming, when assembled, a body 39 bit head such as shownin Letters Patent of split at 8 along the vertical axis ofthe bit 89 theUnited States ranted to me July19,1927, head. Each of these members haspart of Nos. 1,636,6656 8. This bit head has the formation adapted toreceive the shank an inverted V-shaped recess 2 at its lower 9 of a tool10, which we will assume is a end. Extending vertically of the bit head,fiat cutter blade, or like a fish tail cutter 5 parallel with thevertical axis thereof, are orbit. 'This formation may consist of a $5sockets 3, two in number, and at equal dissocket 11 having recesses 12connected theretances from and on opposite sides of the with to receiveprojection 13 on the shank vertical axis of the bit head. These sockets9 of the fish tail cutter or other tool. Each extend "from the inclinedwalls 4 of the member 7 has a shank 41 formed like the V-shaped recess,which walls diverge downshank of the cutter unit above described wardlyand outwardly from the vertical axis and adapted to go into one of thesockets 3 of the bit head. These inclined walls have in the bit head;These shanks, like those seat recesses 5 former therein, about the abovedescribed, are provided with flanges openings of the sockets. Thesesockets and 15 adapted tofit in the seat recesses of the seat recessesare adapted to receive parts oi inclined walls of the inverted V-shapedrethe cutter units when the bit head is used, as cess at the bottom ofthe bit head. These in the patents referred to above, as a support chuckshanks are also threaded at their upper or carrier for rotary cutterunits. These ends at16 like the shanks of the rotary cutunits, as insaid patents, comprise each a ter units that are adapted to go into theshank adapted to fit into the socket, with a sockets, and-like thecutter units, the chuck units are held by nuts introduced into thelaterally open recesses and engaging the screw threads at 16.

V The formation at the meeting faces of the chuck jaws or members may beof any desired form so as to hold the shank of the fish tail bit orother tool which it is desired to use in the bit head. This formationmay be a socket angular in cross sec I tion, as shown in the bottom planview, and

as shown in Fig. 1, the socket formed be tween the halves of the chuckmay have the recesses 12 adapted to receive projections on the shank ofthe fish tail bit. In the use of the apparatus, supposing it is desiredto substitute for the rotary toothed cutters shown in my said patent afish tail bit, so as to turn with the bit head, the rotary cutter unitsare removed from the bit head and an assembled chuck with the shank ofthe fish tail bit held between the sections or halves thereof are movedas one body parallel with the longitudinal axis of the bit head, so thatboth of the shanks will enter the sockets 3, 3 at the same time, andthen by continuing this inserting movement, the shanks Will be seatedand the flanges 15 will enter the seat recesses in the inclined walls ofthe inverted V-shaped recess, and then the shanks are secured by thenuts as above mentioned.

The members constituting the halves of the chuck, when assembled andinserted as just described, will substantially fill the invertedV-shaped recess at the bottom of the bit head and will be sustained bythesewalls against displacement. It will be understood that with acutting tool such as a fish tail bit held by the chuck, rotary motion ofthe bit head about its axis will cause the cutting tool to rotate alsoin doing the cutting. Other forms of tools or appliances may be held bythe chuck. V

The bit head has a channel 17 for the flow of flushing'fluid and thechuck has a like channel 18 to register with the channel 17 for the flowof said fluid to the bottom of the well. I

I claim:

' 1. In combination with a bit head having an inverted V-shaped recessat its lower end with a socket disposed at each side or said recessparallel with the Vertical axis of the sad and opening through thedownwardly and outwardly inclined walls defining said recess, a chuckfor carrying a tool, said chuck fitting in said inverted V-shaped recessand having a pair ofshanks to fit the said sockets and means for holdingthe shanks in said sockets, substantially as described.

2. Apparatus according to claim 1 in which the chuck is formed in twojaws divided from each other substantially in line with the verticalaxis of the bit head, each jaw having one of the shanks'and also havingin itsface a formation to hold the shank of a tool, to be operated bysaid bit head.

3. In earth boring apparatus, in combination with a head having a recessat its lower end and sockets parallel with the axis of the head openinginto said recess, of a two-part chuck insertable axially of said headinto said recess, and means on each of said parts for securing the sameto said head comprising an extension engaging one of said sockets.

4:. The combination with a. head having sockets at one end parallel withits vertical axis of a two-part chuck for carrying a tool when assembledupon the latter, and means for securing said chuck to said headcomprising an off-center shank on each of said parts to fit said headsockets.

5. The combination with a head having a recess at its lower end andsockets parallel with its vertical. axis opening into said recess, of atwo-part chuck for carrying a tool when assembled upon the latter, eachchuck part having a portion fitting one side of said recess and anoil-center shank to fit one of said sockets, and means for securing saidshanks in said sockets.

6. A chuck part comprising a block cut away to provide half of aretaining socket for the shank 01 a working tool and having anofif-center cylindrical projection or shank for securing the part to adrill head, two of said parts being used together to form an earthboring chuck.

7 A chuck part comprising a block providing on. one side a portion of aretaining socket for the shank of a working tool and a portion of apassage for flushing fluid, said part having on its other side acylindrical projection or shank for securin the same to a drill head.

